[Bug 698247] New: BUG: unable to handle kernel NULL pointer dereference
https://bugzilla.novell.com/show_bug.cgi?id=698247 https://bugzilla.novell.com/show_bug.cgi?id=698247#c0 Summary: BUG: unable to handle kernel NULL pointer dereference Classification: openSUSE Product: openSUSE 11.3 Version: Final Platform: x86-64 OS/Version: openSUSE 11.3 Status: NEW Severity: Critical Priority: P5 - None Component: Kernel AssignedTo: kernel-maintainers@forge.provo.novell.com ReportedBy: darin@darins.net QAContact: qa@suse.de Found By: --- Blocker: --- Created an attachment (id=433053) --> (http://bugzilla.novell.com/attachment.cgi?id=433053) Kernel log from the crash User-Agent: Mozilla/5.0 (X11; Linux i686; rv:2.0.1) Gecko/20100101 Firefox/4.0.1 I'm seeing this with some frequency on this server, once or twice per week, and I'm forced to reset afterward because it becomes unresponsive. I've references a bug very similar to this from opensuse 11.2 under the "additional notes. Every 5 minutes 4 cron jobs execute which perform "sftp" downloads from a remote system. There appears to be some correlation between these events and the kernel panics. Jun 4 19:05:03 braid1 kernel: [377572.593313] BUG: unable to handle kernel NULL pointer dereference at 0000000000000009 Jun 4 19:05:03 braid1 kernel: [377572.597186] IP: [<ffffffff812d8a89>] n_tty_read+0x299/0x900 Jun 4 19:05:03 braid1 kernel: [377572.598368] PGD 0 Jun 4 19:05:03 braid1 kernel: [377572.599482] Oops: 0000 [#1] PREEMPT SMP Jun 4 19:05:03 braid1 kernel: [377572.600600] last sysfs file: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0003:00/power_supply/ACAD/online Jun 4 19:05:03 braid1 kernel: [377572.604992] CPU 0 Jun 4 19:05:03 braid1 kernel: [377572.605028] Modules linked in: nfs lockd fscache nfs_acl auth_rpcgss sunrpc autofs4 edd mperf acpiphp fuse loop dm_mod ppdev sg parport_pc vmware_balloon sr_mod mptctl parport pcspkr cdrom floppy i2c_piix4 shpchp pci_hotplug vmxnet3 intel_agp vmci container ac button ext4 jbd2 crc16 sd_mod fan processor ata_generic ata_piix libata mptspi mptscsih mptbase scsi_transport_spi scsi_mod thermal thermal_sys Jun 4 19:05:03 braid1 kernel: [377572.612387] Jun 4 19:05:03 braid1 kernel: [377572.613569] Pid: 21571, comm: sftp Not tainted 2.6.34.8-0.2-desktop #1 440BX Desktop Reference Platform/VMware Virtual Platform Jun 4 19:05:03 braid1 kernel: [377572.616010] RIP: 0010:[<ffffffff812d8a89>] [<ffffffff812d8a89>] n_tty_read+0x299/0x900 Jun 4 19:05:03 braid1 kernel: [377572.617340] RSP: 0018:ffff88043afabdc8 EFLAGS: 00010246 Jun 4 19:05:03 braid1 kernel: [377572.618611] RAX: 0000000000000009 RBX: ffff88043afaa000 RCX: 00007f3f782ed016 Jun 4 19:05:03 braid1 kernel: [377572.619898] RDX: 0000000000000000 RSI: ffff88043afabe78 RDI: ffff8801c4c1451c Jun 4 19:05:03 braid1 kernel: [377572.621159] RBP: ffff8801c4c14000 R08: ffff88043afaa000 R09: 0000000000000000 Jun 4 19:05:03 braid1 kernel: [377572.622445] R10: dead000000100100 R11: 0000000000000001 R12: 0000000000000000 Jun 4 19:05:03 braid1 kernel: [377572.623712] R13: ffff8801c4c1451c R14: 7fffffffffffffff R15: ffff8801b7da40c0 Jun 4 19:05:03 braid1 kernel: [377572.625004] FS: 00007f3f782d9720(0000) GS:ffff880001e00000(0000) knlGS:0000000000000000 Jun 4 19:05:03 braid1 kernel: [377572.626309] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b Jun 4 19:05:03 braid1 kernel: [377572.627584] CR2: 0000000000000009 CR3: 000000043dc45000 CR4: 00000000000006f0 Jun 4 19:05:03 braid1 kernel: [377572.628920] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Jun 4 19:05:03 braid1 kernel: [377572.630260] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Jun 4 19:05:03 braid1 kernel: [377572.631524] Process sftp (pid: 21571, threadinfo ffff88043afaa000, task ffff8801b7da40c0) Jun 4 19:05:03 braid1 kernel: [377572.632803] Stack: Jun 4 19:05:03 braid1 kernel: [377572.634047] 00007f3f782ed016 00007f3f782ed000 0000000000000000 ffff88043bac7840 Jun 4 19:05:03 braid1 kernel: [377572.634106] <0> 00ff88043afabed8 0000000000000000 0000000000000000 ffff8801b7da40c0 Jun 4 19:05:03 braid1 kernel: [377572.635381] <0> 0000000000000000 ffff8801c4c141c0 ffff8801c4c14490 ffff8801b7da40c0 Jun 4 19:05:03 braid1 kernel: [377572.637837] Call Trace: Jun 4 19:05:03 braid1 kernel: [377572.639062] [<ffffffff812d350e>] tty_read+0xbe/0x110 Jun 4 19:05:03 braid1 kernel: [377572.640271] [<ffffffff811251f3>] vfs_read+0xb3/0x190 Jun 4 19:05:03 braid1 kernel: [377572.641443] [<ffffffff8112531e>] sys_read+0x4e/0x90 Jun 4 19:05:03 braid1 kernel: [377572.642618] [<ffffffff81002ffb>] system_call_fastpath+0x16/0x1b Jun 4 19:05:03 braid1 kernel: [377572.643765] [<00007f3f762d03e0>] 0x7f3f762d03e0 Jun 4 19:05:03 braid1 kernel: [377572.644880] Code: ff 0f 84 89 00 00 00 44 8b a5 5c 02 00 00 f0 44 0f b3 a5 68 02 00 00 45 19 e4 48 63 85 5c 02 00 00 48 8b 95 50 02 00 00 4c 89 ef <0f> be 1c 02 e8 ee ae 1c 00 8b 95 5c 02 00 00 83 ad 60 02 00 00 Jun 4 19:05:03 braid1 kernel: [377572.648365] RIP [<ffffffff812d8a89>] n_tty_read+0x299/0x900 Jun 4 19:05:03 braid1 kernel: [377572.649504] RSP <ffff88043afabdc8> Jun 4 19:05:03 braid1 kernel: [377572.650580] CR2: 0000000000000009 Jun 4 19:05:03 braid1 kernel: [377572.654604] ---[ end trace 96909f86a96d2abc ]--- Jun 4 19:05:03 braid1 kernel: [377572.656258] tty_release_dev: pts3: read/write wait queue active! Jun 4 19:05:03 braid1 kernel: [377572.657376] tty_release_dev: pts3: read/write wait queue active! Reproducible: Always Steps to Reproduce: 1. 2. 3. Output from "uname -a": Linux braid1 2.6.34.8-0.2-desktop #1 SMP PREEMPT 2011-04-06 18:11:26 +0200 x86_64 x86_64 x86_64 GNU/Linux 4 x CPU's 16GB Memory Running under VMware. This bug is nearly identical to the behavior we're seeing, which was close due to non-responsiveness. https://bugzilla.novell.com/show_bug.cgi?id=581796 -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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Jiri Slaby
RIP [<ffffffff812d8a89>] n_tty_read+0x299/0x900 .. This bug is nearly identical to the behavior we're seeing, which was close due to non-responsiveness. https://bugzilla.novell.com/show_bug.cgi?id=581796
I don't think so. You are hitting the races which I debugged and sent patches for few days ago. I also need to take a look if all patches for the races I caught some time ago are committed in 11.3. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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Jiri Slaby
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--- Comment #3 from Darin Perusich
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--- Comment #4 from Jiri Slaby
I would gladly give a patched kernel a try, but there are to download at the provided link.
Now fixed. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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Darin Perusich
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Jiri Slaby
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--- Comment #6 from Darin Perusich
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Jiri Slaby
Is there anything else I can do to test this?
I don't think so, just keep an eye on it. I'll commit the fix later. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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Jiri Slaby
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--- Comment #9 from Bernhard Wiedemann
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Marcus Meissner
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--- Comment #16 from Darin Perusich
A kernel update for SUSE Linux Enterprise 11 SP1 was just released that contains/mentions this fix. The release version is 2.6.32.43-0.4.1.
Great but when can a kernel update for OpenSUSE be expected? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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--- Comment #18 from Marcus Meissner
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--- Comment #20 from Bernhard Wiedemann
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